Pro–am (sometimes pro-am, pro/am, pro am or ProAm), short for, but rarely written out as, professional–amateur, is a concept that describes a blurring of the distinction between professional and amateur competition within a sport (or sportlike competition in a non-sport game). In reference to players, the term thus also implies a status (official or otherwise) that is intermediate, indeterminate or fluctuating between amateur and professional, rather than simply implying amateur activity at a professional level or vice versa, ideas more related to the similar socio-economic term "amateur professionalism". A common synonym for some uses of "pro–am" is semi-professional (semi-pro).
The term has long had various meanings and significances, depending upon the sport in question. Those who play at a highly competitive and strongly skilled level, but are not paid, are often called pro–ams. The term is also applied to competitors who do get paid in some events (e.g., tournaments with a cash prize) but who do not make a full-time living at the activity. In sports with a highly-regulated system of professional qualifications and limitations, it may be applied to competitors whose careers move between professional and amateur status with their performance in any given season or string of seasons.
As an adjective, the term may also refer to an open contest or series of contests (e.g., "pro–am tournament", "pro–am tour") in which professionals and amateurs compete without distinction; those limited to "professional–amateur" players and barring full-time pros; or those of a semi-professional or minor league level, short of the top competitive ranks in the sport.
Pro–am competition is especially common in golf and track and field. Cue sports is another field in which pro–am play is common; an example in the open, mixed-play sense is the International Pool Tour in eight-ball; meanwhile, the International Open Series in snooker was a no-pros tour and a proving ground for amateurs aspiring to official pro qualification. Minor League Baseball, and its conceptual equivalents in other sports such as the AHL in North American ice hockey and Conference National play in English football, can also been seen as a form of well-organized pro–am play in the semi-professional sense.